Improvement in splitting and shaping stone by machinery



- A. W. ANDREWS. Splitting and Shaping Stone by Machinery.

No. 205,989. Patenteq July 16, 1878'.

UNITED STATES PATENT OEEIoE.

ABRAM W. ANDREWS, OF BROOKLYN, NEW YORK, ASSIG N OR TO ELIZABETH REQUA, OF SAME PLACE.

IMPROVEMENT IN SPLITTING AND SHAPING STONE BY MACHINERY.

Specification forming part of Letters Patent No. 205,989

dated July 16, 1878; application filed January 28, 1878.

To all whom it may concern: side to side. It is fitted in the recess so as to Be it known that I, ABRAM W. ANDREWs, be held firmly in its position. of Brooklyn, in the county of Kings, State Directly over the chisel a is placed the of New York, have invented new and useful movable chisel a, and which is secured firmly Improvements in Splitting and Shaping Stone by a dovetail joint or other suitable means by Machinery for Blocks for Pavements and in the lower end of the piston or operating other Purposes, of which the following is a rod 0, which has a vertical reciprocating mospecification, reference being had to the drawtion within the cylinders 61. The line of the ing accompanying and making part thereof. cutting-edge of a must coincide with that of a. The object of my invention is to split and In the drawing, the cutting or splitting reduce rock or stone in the rough into rectanchisel a is represented of a shape which has gular forms, and of suitable size, for blocks but one cutting or splitting edge; but this is for the pavements of streets; and it is also not essential, as I, in practice, use the same applicable to the splitting of stone for any form for the movable chisel a as for the fixed purpose in which one or more flat surfaces are chisel a, and fitted in like manner into a suitrequired. able recess to hold it, so that both chisels may My invention has reference, first, to the be turned in their beds and held so as to pre form of the splitting tools or chisels and the sent a fresh angle and edge to the stone as one manner of arranging and using the same edge becomes worn. in the machine; secondly, to the construc- When the pieces of stone in the rough are tion and use of an elastic bed or cushion for to be operated upon by the chisels, it is necesholding the stone in the rough and adjusting sary that these pieces should be placed in a its position upon the anvil or base of the suitable position, and to be retained in it, to machine, so that it will be held properly to properly receive the action of the chisels. For receive the action of the cutting or splitting this purpose I construct a bed or cushion of tools; and,thirdly, to the combination of these india-rubber, c, which is laid flat upon the devices with the driving and operating maupper face of the anvil. This cushion or bed chinery. is provided with a slot or opening in the line In the accompanying drawing, Figure repof the edges of the chisels, so as to allow the resents a front elevation of my improvements, edges to act upon the stone without injuring and of a steam-cylinder and piston-rod and the rubber bed. This bed or cushion I make the base or anvil of the machine. Fig. 2 repof india-rubber, as the best material for the resents a side elevation of the same parts at purpose; but any other elastic or yielding right angles to Fig. 1. material suitable may be used. The bed must In each of the figures similar letters reprebe of sufficient thickness to embed the stone, sent similar parts. so as to hold it in the position in which it may The splitting tool or chisel a is shown in be placed to receive the blow of the chisel. both figures-4n end view in Fig. 2 and in The stone to be split, f, may be of any size, side view in Fig. 1, partly in dotted lines. to be placed between the chisels and allow the It is composed of a solid block or bar of steel, play of the machine. It is placed between of a quadrangular form, having four sharp the chisels, and is adjusted upon the bed of angles along its whole length. These angles rubber, so as to receive the action of the chisels constitute the cutting or splitting edges of the upon it, as is desired. chisel. This chisel is placed in the base or The piston-rod 0 being put in motion by the anvil of the machine I), in a recess correspond steam machinery, the operation of splitting ing to it in form, but so that the edge or and shaping the stone is performed with great angle will always project above the upper rapidity and economy of time and labor, and face of the anvil sufficiently to act upon the with precision.

stone, and it extends across the anvil from Having thus described my invention, and

3. The combination of the chisel or tool a and the bed or cushion 0 with the anvil I) and the driving or piston rod 0, for the purposes of a stonesplitting machine, in the manner substantially as set forth.

ABRAM \V. ANDREWS.

1;); the same, what 1 claim the manner of usii tosevure by Letters lutent therein, and desire 1. The splitting-tool a a, composed of a solid bar of steel of quadrangular form, and having the angles for splittiiigedges, as set forth.

2. The elastic cushion or bed 0 upon the anvil, for adjusting and holding the stone in the required position, substantially as set forth.

Witnesses:

FRANK E. Mono-AN,

FRANK TONKS. 

